Support or bearing for drying cylinders and such like



W. P. EVANS.

SUPPORT 0R BEARING FOR DRYING CYLINDERS AND SUCH LIKE.

. Patented Jun 27, 1922.

2 SHEETSSHEET'I APPLICATION FILED SEPT- 25, I920.

ATT'y W. P. EVANS.

SUPPORT 0R BEARING FOR DRYING CYLINDERS AND SUCH LIKE.

1y42l 1 93' APPLICIATION FILED SEPT. 25, I920.

2 SHEETS-SHEET 2.

FIGS.

ATT)".

Irlams Oth Height,

WILLIAM PARSONAGE EVANS, OF CHESTER, ENGLAND.

. SUPPORT OR BEARING FOR DRYING CYLINDERS AND SUCH LIKE.

To all whom it may concern:

EVANS, a subject of the King of Great Brit-- ain and Ireland, residin at 72 Park Lane, anchester, in the county of Lancaster, England, have invented new and useful Improvements in or Connected with Supports or Bearings for Drying Cylinders and Such like, of which the following is a specification.

This invention relates to supports or bearings for the trunnions or hollow shafts of steam heated drying cylinders, and such like, and which supports or bearings are commonly known as doll heads.

In existing types of doll head, a hollow bracket or standard is employed and a hearing is provided and fed with lubricant from a box, while a gland is used to force encircling packing around the .exterior of the bored trunmon or neck. The packing, which is acted on by the gland, prevents escape of steam as is understood. In practice, such gland needs attention from time to time in order to keep a steam tight joint, and the gland is apt to be screwed down too tight.

find such packing is apt to grip or bind on the shaft or neck thus setting up' wear and consuming power. Even without undue pressure from the gland, the packing encircling the 'shaft is bound to exercise an appreciable grip or binding effect.

'The attached drawing illustrate s, and b way of examples, forms of doll-head whic embody my feature of novelty, that is the employment of a flexible diaphragm or area to effect an automatic closure due to fluid pressure.

Fig. 1 is a section showing a simple form of doll-head bearing with combined diaphragm. Fig. 1 is a detail sectional view of a modification of trunnion end.

Fig. 2 shows a modification wherein the diaphragm is backed-up by a follower with spring devices. Fig. 2 is a section taken approximately on the line A-A of Fig. 2. i

Fig. 3 is an end elevation of Fig. 2 looking from the right.

Fig. 4 shows an end elevation of Fig. 2 looking from the left. 7

Fig. 5 is a view of a modified form of doll-head casting, adapted to receive a diaphragm in accordance with my invention, and in which removalof the end cover fully exposes the diaphragm and its co-acting parts.

Specification of Letters Patent. Patented June 2%, 1922,

Application filed September 25, 1920. Serial No. 412,845.

In the construction illustrated by Fig. 1 I make use of a doll-head casting a of ap propriate design and this has a hollow chamber or cavity a and a prepared face a for the reception of a diaphragm b consisting of one or more flexible plates or sections of metal or material. This diaphragm b is shown secured by a ring 0, east along with the lower bearing half a which supports the axle or trunnion c of the drying cylinder, the ring a being fixed in place by studs a as shown. The upper bearing half ,a may combine a lubricant box an with cover a asis 'known. I

The -diaphragm b has a central hole or aperture and such diaphragm as to its central aperture is sweated in place and clamped between the bored rings 6, V, which rings may carry ackings of metal or fibrous or other materia The hollow trunnion or axle c of the drying cylinder may have a turned reduction or neck 0 which passes through the bored rings b, b which fit the central hole in the diaphragm, and, if desired an adjustable or other collar or annular abutment may be fitted on the turned reduction or neck 0 In the illustration Fig. 1, the vertical wall of metal to the right of .the turned reduction or neck forms the annular abutment c. Any'other suitable construction of trunnion end may be adopted by me, as for example, a smaller diameter of tube screwed into the bored trunnionand may be provided to pass through rings such as 6' b or their equivalent, as indicated by the detailview Fig. 1.

The annular abutment 0 acts as a limit stop against which the contact ring, or packing device carried by the diaphragm is forced.

In the construction illustrated by Fig. 2, I show the'diaphragm b clamped between a slidable ringb' and the annular part d of a follower or slidable or movable device d (separatel illustrated at Fig.2). ment of t e parts which clamp the cut out centre of the diaphragm b is limited by lock-' nuts e. The stirrup shaped part or cross bar cl of the follower (Z is bored and a screw 9 or adjusting appliance is loosely connected thereto, the screw having washers g, 9 held by pins or otherwise, and springs g g are interposed between the washers and the cross-bar d, which produce a non-rigid connection between the follower d and the screw 100. Move- I studs a.

and its packing rings'to permita closure .with a greater or smaller movement of-the diaphragm. Such an arrangement also allows me to compensate for wear. Theficover plate a-' is removable and is secured: by

In the constructionindicated by Fig.

the inner ring 0"? forms part of the casting alon with the stand-a and the lower bearing alf m, and a largeouter cover plate a. is removably fixed to-' the inner ring by studs a the diaphragm being clamped as to" vits edge between the-two rings. ,This large v outer cover late a may be bored and tappedfor the app ication of a device to control thefollower 'or the like, if such be used with the" m. The advantage of this construe diaphra tion is that removal ofcover plate completely cumferential "packing alto ther by reason'of the "small lateraf calling or fre uentattentionbyt exposes the diaphragm etc,- The cast-iron elements in this construction provide proper passage ways for steam, etc.

When a cylinder supported'in such' doll;

headbe'aring is at work the diaphragm is'as to one face backed-up by fluid pressure, that 1s, low pressure steam, and'consequently ;it

provides anextended area'with great accommodating capacitfi rings or supporte with an elastic pressure ,ment 0 or its'equlvalent. With doll-heads such packing" efiects a closure against the abutthe com arativel large area of the diaphragm d is acte on-by the "steain' and the rm thus effectively packed by end thrust alone callyad'ust the rings or packing; without l p r tive, but it-ena les me to dd away-with cirj- 1ows for expans on-of t "steam heat l and :the y-rin .o 'r packing ican' readily accommodateitse'l tomakefgoodany failure asto 5 riect alignment-.1 Alsosin the event of rap d condensa'tion of steami th'e' [creation ofa partialvacuum in the cylinder tends to cause the diaphragm device mama fas toadmitair andmay, obviate the use of in fslidablei acking rings clampi ;;tei" oftlie .fdlaphra "the centralri' to pack sa1d"a e", '2: An attacf'able gfdllhea'd. bearing lfo steam-'heatedldryingfc linder's,'compris1ng a and by actingbn Ethel; yielding areaya facet ereof enclosed inthe I when.

steam enters and fills the hollow-cavity a,,

or packing'deviceisthrustagainst the en of thehollow trunnion or neckv which is'.'

vide' wider'onlar er bearings, in the usual available fsp'ace f t an has heretofprflj 'Theijcombined',diaphragm or-the like alan air-valve for such I declare that what claim is-'- diaphragm-having acentral aperture therecylinder under a J55 An attachablejdoll head bearing forsteam heated drying cylinders, com 1 a flexiblejdiaphragmfa faceon the do head castin .forlsaid d1aphragm,'an annular- I clamping ring for clampiugsaid diaphragm,

bolts for securing said ring in position, said" the cen- I ,-,a hollow-ax eon the a [drying cylinder en -a shoulder ;on the axle forming areduced portion on theiaxle, said 'construction allowing steamipres'sure'to act a onthe outer of-the diaphra 'doll hea'd, an z'alil'nularzclampingring clampl eridrportion ofsaid yieldm area to the doll head body, b lt' fi i g said camp to cause ,ing ring, said yieldmgarea'havmg a-central aperture therein, packing rings located at packin an'a JiiStiIIg device capable of movking 'rings,=,a screw-,for regulat- 'usting device, a: hollow trunnion actuated by, pressure on the .outenface 'efi'ectj closure otthej dollheadg l i e mb y' wher Ishaye' signed my I mto said central a erture'c onstituting a movable h;

{on 'the dryi cylinder, :"ag shgulder on the trunnion, an .meansfor' limiting movement I of the"- packing" ljthedi aphragm being 

